l 回顧與復習
real-world（現(xiàn)實世界的） robots（機器人）
when （conj. 在...的時候）you think of（想起） a robot，do you（有光澤的）,metallic（金屬的） device（設備） having the same general（普通的，通常的） shape as a human being，performing humanlike functions，and responding to your questions in a monotone(單調(diào)的)voice accentuated(使更明顯)by high-pitched tones and beeps? this（想象） a robot，but in the real world a robot is（有人的特點的） at all．instead，a robot often is a voiceless ,box- shaped machine that efficiently carries out repetitive or dangerous functions usually performed by humans. today’ s robot is more than an automatic machine that performs one task again and again． a modern robot is programmed with varying degrees of artificial intelligence，that is，a robot contains a computer program that tells it how to perform tasks associated with human intelligence，such as reasoning，drawing conclusions，and learning from past. not humanoid is the way many of us imagine imagine a shiny